Charging time: ≈3.5 hours, Output power: 65W, Material: Aluminium alloy+ABS, Color: Black/Shining Silver, Running time: ≥ 21 minutes, Input current: DC 5V/3A(max), Charging input port: Type-C, Absorbing pressure: ≈4kPa, Applicable to: in-car/indoors, Battery capacity: 11.1V/2000mAh, Technology: Oxidation.
Check coupons or create price alert down below. What is best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
1. ($39.99): BGdcbfa8
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): AM15prime, BGAnniversary, AMPrime01, Automo, BgAuMotor, BG8109, BGAutos, bGhOnEy10, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, 7d18f7, BGAFF10OFF, BGCuponation10, 13f142, BGHONEY2110, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BGBRHS470
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Baseus Car Vacuum 4000Pa 2000mAh. The lowest price was: $29.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).